/* Copyright (c) 2016, 2022, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef DD_TABLES__TRIGGERS_INCLUDED
#define DD_TABLES__TRIGGERS_INCLUDED

#include <string>

#include "sql/dd/impl/raw/raw_record.h"
#include "sql/dd/impl/types/object_table_definition_impl.h"
#include "sql/dd/impl/types/object_table_impl.h"  // dd::Object_table_i...
#include "sql/dd/impl/types/trigger_impl.h"       // dd::Trigger_impl
#include "sql/dd/object_id.h"
#include "sql/dd/string_type.h"

class THD;

namespace dd {
class Object_key;
}  // namespace dd

namespace dd {
namespace tables {

///////////////////////////////////////////////////////////////////////////

class Triggers : virtual public Object_table_impl {
 public:
  static const Triggers &instance() {
    static Triggers *s_instance = new Triggers();
    return *s_instance;
  }

  static const CHARSET_INFO *name_collation();

  enum enum_fields {
    FIELD_ID,
    FIELD_SCHEMA_ID,
    FIELD_NAME,
    FIELD_EVENT_TYPE,
    FIELD_TABLE_ID,
    FIELD_ACTION_TIMING,
    FIELD_ACTION_ORDER,
    FIELD_ACTION_STATEMENT,
    FIELD_ACTION_STATEMENT_UTF8,
    FIELD_CREATED,
    FIELD_LAST_ALTERED,
    FIELD_SQL_MODE,
    FIELD_DEFINER,
    FIELD_CLIENT_COLLATION_ID,
    FIELD_CONNECTION_COLLATION_ID,
    FIELD_SCHEMA_COLLATION_ID,
    FIELD_OPTIONS,
    NUMBER_OF_FIELDS  // Always keep this entry at the end of the enum
  };

  enum enum_indexes {
    INDEX_PK_ID = static_cast<uint>(Common_index::PK_ID),
    INDEX_UK_SCHEMA_ID_NAME = static_cast<uint>(Common_index::UK_NAME),
    INDEX_UK_TABLE_ID_EVENT_TYPE_ACTION_TIMING_ACTION_ORDER,
    INDEX_K_CLIENT_COLLATION_ID,
    INDEX_K_CONNECTION_COLLATION_ID,
    INDEX_K_SCHEMA_COLLATION_ID,
    INDEX_K_DEFINER
  };

  enum enum_foreign_keys {
    FK_SCHEMA_ID,
    FK_TABLE_ID,
    FK_CLIENT_COLLATION_ID,
    FK_CONNECTION_COLLATION_ID,
    FK_SCHEMA_COLLATION_ID
  };

  Triggers();

  /**
    Create a key to find all triggers for a given schema.

    @param schema_id   Object_id of the schema.

    @returns Pointer to Object_key.
  */

  static Object_key *create_key_by_schema_id(Object_id schema_id);

  /**
    Create a key to find all triggers for a given table.

    @param table_id   Object_id of the table.

    @returns Pointer to Object_key.
  */

  static Object_key *create_key_by_table_id(Object_id table_id);

  /**
    Find table's Object_id for a given trigger name.

    @param thd          Thread
    @param schema_id    Object_id of schema in which the trigger exists.
    @param trigger_name Name of trigger we are search for.
    @param oid [out]     The Object_id of trigger.

    @returns
      false on success.
      true upon failure.
  */

  static bool get_trigger_table_id(THD *thd, Object_id schema_id,
                                   const String_type &trigger_name,
                                   Object_id *oid);

  /**
    Create a key to find all triggers for a given definer.

    @param definer   Name of the definer.

    @returns Pointer to Object_key.
  */
  static Object_key *create_key_by_definer(const String_type &definer);

 private:
  /**
    Create a key to find a trigger by schema_id and trigger name.

    @param schema_id    Object_id of the table.
    @param trigger_name Name of trigger.

    @returns Pointer to Object_key.
  */
  static Object_key *create_key_by_trigger_name(Object_id schema_id,
                                                const char *trigger_name);

  /**
    Get the table id from the record.

    @param r    const Reference to the Raw_record.

    @returns Object_id of the table.
  */

  static Object_id read_table_id(const Raw_record &r);
};

///////////////////////////////////////////////////////////////////////////

}  // namespace tables
}  // namespace dd

#endif  // DD_TABLES__TRIGGERS_INCLUDED
